基于FPGA的出租车计费器论文.docVIP

基于FPGA的出租车计费系统的设计 摘要 随着我国市场经济的发展，交通也越来越便利，特别是计程车，以快捷、方便的特点早已盛行各个城市，成为城市交通的重要工具。计程车市场从90年代初的起步阶段到现在已经进入了高峰期随着城市化水平的提高和人民生活水平的改善，计程车的服务也就显得越来越重要。因此计程车计价器也就应运而生了Design of taxi meter Based on FPGA Abstract As Chinas market economy develops，more and more convenient transport，particularly taxis, to fast, convenient features have long been popular in various cities and become an important tool for urban traffic. Taxi market in the early 1990s,the initial stage up to now has entered a peak period. With the level of urbanization and the improvement of peoples living standards improve, taxi services will become increasingly important. Taxi meter therefore it has emerged. This paper analyses the current domestic and foreign taxi billing system and the basic working principle and the two main design; Based on the design of microcontroller and FPGA-based design; and both the strengths and the ways Shortcomings of the analysis，comparison of the system established after the programme: FPGA-based billing system for taxis. In this design mainly through the VHDL language programming billing systems of the four function blocks：the frequency modules, control module, the measurement modules and decoding modules, the final use of MAX + PLUSII software to simulate the procedures to Simulation of the realization of a taxi start, stop and wait in the course of time, and so on, including-and billing functions。And the results of the functional modules through dynamic decoding scanning module output to display module to display it. Through the display module Taxis By the travelling distance, a taxi waiting for the time and were waiting for a taxi in the process of moving costs and fees in the process. Keywords：CPLD/FPGA;VHDL;MAX+PLUSSII; Taxi；Meters 目录 1绪论 5 1.1研究的意义 5 1.2当前国内外的研究现状 5 1.3本课题的目的 5 1.4本论文的章节安排 6 2 VHDL和FPGA的简介 7 2.1 VHDL的介绍 7 2.2 FPGA的介绍 7 3 Max+plusII平台简介 9 3.1概述 9 3.2 Max+plusII的特点 9 4 设计方案的简介及比较 11 4.1基于单片机出租车计费器设计方案 11 4.1.1硬件各模块的功能 11 4.1.2程序设计模块 12 4.2基于FPGA的出租车计费器的设计方案 1